他们憎恶对他们国家内政的外来干涉。
They resent foreign interference in the internal affairs of their country.
他们决定在某些关键职位上聘任外来人员。
They have decided to hire outsiders for some of the key positions.
农场主们一直在寻求更高价格来作为对外来竞争的更好保护。
The farmers have been seeking higher prices as better protection from foreign competition.
我们反对任何外来势力插手干预。
外来物种和本地物种的区分是人为的。
Distinctions between exotic and native species are artificial.
我们不容许任何外来干涉。
外来害虫可以对森林生态系统产生短期和长期的影响。
Exotic insect pests can produce both short-and long-term effects on forest ecosystems.
我的大多数朋友都搬到城外来躲避城市的噪音、烟雾和交通。
Most of my friends are moving outside the city to avoid the noise, smog and traffic of the city.
这只是对我们的免疫系统试图防御的潜在外来入侵者的分类介绍。
Just an introduction to the classes of potential foreign invaders that our immune system tries to defend us against.
生态学家通常把外来物种定义为人们偶然或故意带到新地方的物种。
Ecologists generally define an alien species as one that people, accidentally or deliberately, carried to its new location.
外来掠食者最初不受自身掠食者的限制，它们可能会迅速繁殖并击溃预定目标。
Initially unrestrained by predators of their own, foreign predators are likely to be able to multiply rapidly and overwhelm intended targets.
马达加斯加被一些人称为“被时间遗忘的岛屿”，是众多独特外来生物的家园。
Called by some the "island that time forgot", Madagascar is home to a vast array of unique, exotic creatures.
在美国总共15万的物种中，有7000种外来物种，当中只有10%是入侵物种。
Of the 7,000 alien species in the United States—out of a total of 150,000 species—only about 10 percent are invasive.
一些科学家质疑这样的假设，即在自然生态系统中，外来物种的出现是绝对不会被接受的。
A number of scientists question the assumption that the presence of alien species can never be acceptable in a natural ecosystem.
我们正在做的另一件事是除掉生长在花园里的一些外来物种，并种回一些本地植物和树木。
The other thing we're doing is getting rid of some of the foreign species that are growing in the gardens and putting back some native plants and trees.
现在，外来食肉植物的黑市交易非常活跃，以至于植物学家一直对某些稀有物种的位置三缄其口。
The black market trade in exotic carnivorous plants is so vigorous now that botanists are keeping the location of some rare species a secret.
19世纪末，狗舌草被偶然引入新西兰，像许多入侵的外来物种一样，它很快就变成了一种有害生物。
Ragwort was accidentally introduced to New Zealand in the late nineteenth century and, like so many invading foreign species, quickly became a pest.
本土物种和外来物种都有可能成为入侵物种，因此当它们开始失控时，我们必须对它们进行监视和控制。
Both native and exotic species can become invasive, and so they all have to be monitored and controlled when they begin to get out of hand.
田纳西大学生态学和进化生物学教授唐·史密斯说：“只有一小部分外来物种会在新栖息地引发问题。”
"Only a small percentage of alien species cause problems in their new habitats," said Don Smith, professor of ecology and evolutionary biology at the University of Tennessee.
“只有一小部分外来物种会在它们的新栖息地引发问题。”田纳西大学生态学和进化生物学教授唐·史密斯说。
"Only a small percentage of alien species cause problems in their new habitats,'' said Don Smith, professor of ecology and evolutionary biology at the University of Tennessee.
进一步的观察表明，实际上教师们倾向于站在情况外来评估事件，而不是以一种深思熟虑的方式来审视促成因素。
Further observation revealed the tendency of teachers to evaluate events rather than review the contributory factors in a considered manner by, in effect, standing outside the situation.
这是一座移民城市——该市如今38%的人口为外来人口——移民以及他们的子代在美国经历了显著的向社会上层流动。
This is a city of immigrants 38 percent of the city's population today is foreign-born and immigrants and their children have historically experienced significant upward mobility in America.
生态学家警告说，外表可能具有欺骗性，而且这些外来物种中可能有许多是为人接受的，只是因为没有人记载过其有害影响。
Appearances can deceive, ecologists caution, and many of these exotics may be considered acceptable only because no one has documented their harmful effects.
对非外来物种的研究没有得到类似的结果，这使得研究人员推测鸟类的社会学习能力可能与哺乳动物的社会学习能力有根本性的区别。
Studies on nonalien species have not produced similar results, leading researchers to speculate that avian social learning may be fundamentally different from that of mammals.
然而，生态学家警告说，这些表象可能并不是真的；而且，这些外来物种中有许多可能被认为是可接受的，只是因为没有人记载过它们的有害影响。
Yet appearances can deceive, ecologists caution, and many of these exotics may be considered acceptable only because no one has documented their harmful effects.
外来移民顺利地融入当地社会。
Immigrants have been successfully assimilated into the community.
随着外来移民的到来，这里的文化变得多元化了。
The culture has been diversified with the arrival of immigrants.
乌鸫交配时会保护自己的地盘，不允许外来者侵入。
Mating blackbirds will defend their territory against intruders.
外来人一直都不友善。
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